New California tire criteria?

G

George Bynum

Joined
Dec 18, 2004
Messages
475
Location
Greenville SC
From another site, California is requiring tires to meet OE standards for rolling resistance and wet traction.

I guess there will be no more "summer tires" unless the OEM used them?

It won't let me upload the pdf, and the site (Mike Holt NEC) link isn't accepted either; forums.mikeholt.com/attachments/replacement-tire-efficiency-program-2-pdf.2563845/ with https:// omitted
 
Haven't heard that one yet. We do have to be very careful of tire load index and speed rating. Anything that goes on the vehicle must me at least the speed rating and load index that the manufacturer specifies or greater.
 
First, this is proposed regulations.

Second, IF approved, it wouldn't go into effect until 2026.

I am planning on writing up a summary, but I want to be sure I understand fully what's involved. To that effect, there is an open meeting of the California Energy Commission taking place Feb 14 to discuss that proposal. I won't publish anything until after that meeting.
 
If anything, it sounds like the EU’s labeling requirement for tires, and the SmartWay program the EPA has for OTR fleets.

The bigger tire companies won’t have a problem meeting this - but the smaller(usually Asian ones) will.

The DOT’s UTQG program uses a special Uniroyal Tiger Paw tire for that test I think. CA probably won’t have the facilities to test everything.
 
I can't get through to that forum, as I don't have a log in.

Officially rating a tire for rolling resistance, to a known standard, is still in its infancy. While I'd like that data to make an informed choice, I'd also like to have a choice.
 
eljefino said:
I can't get through to that forum, as I don't have a log in.

Officially rating a tire for rolling resistance, to a known standard, is still in its infancy. While I'd like that data to make an informed choice, I'd also like to have a choice.
Click to expand...
The bigger brands are self-certifying LRR(Michelin Total Performance/Green X, Conti EcoPlus, Pirelli Ecoimpact, Yokohama BluEarth) or making entire LRR lines(Bridgestone Ecopia, Dunlop Japan Enasave, Toyo NanoEnergy).

CA knows Chinese/Thai tires are getting popular as an aftermarket replacement and those guys all self-certify or pay a TUV-enlisted test lab in China/Singapore/Thailand to do their testing per the DOT rubric.
 
What does this do to the enthusiast, that wants to put an aggressive set of tires on? As someone mentioned, a nice set of summer tires for a Mustang or Camaro or Porsche?
 
BHopkins said:
What does this do to the enthusiast, that wants to put an aggressive set of tires on? As someone mentioned, a nice set of summer tires for a Mustang or Camaro or Porsche?
Click to expand...
The German model generally prevents such things, unless performed by AMG or some factory owned performance department. CA and by default, other states, are following the authoritarian model.
 
I truly hope that doesn't happen to where I live.

For example, my 2018 Taurus came with HORRID Michelin Primacy MXM4 garbage tires on it. First sign of precipitation and they slid around everywhere! They were bad in the rain and downright scary in the snow. How they called these "all season" tires is beyond me. Michelin makes some great tires, especially in their Pilot series, but these OE tires just truly are terrible in every manner but fuel mileage. What good is fuel mileage when I'm paying $1000 deductible for an accident because the tires can't even handle a light rain?

Currently, I have Conti DWS-06Plus tires; UPH all seasons. (Don't laugh, it needs all the help it can get ...) These tires ROCK! They don't have the treadwear rating or rolling resistance rating that the OE tires do, but they sure grip better in all four seasons. Way, Way better.

If I had to use the mileage-happy OE stuff, I'd sooner :sick: vomit.
 
It's based on a Rolling Resistance Coefficient derived from ISO 28580:2009(E)

1675392460717.png


Here's an interesting paragraph:

1675392547563.webp
 
UG_Passat said:
Looks like people will have to go to neighboring states to smuggle "illegal" tires
Click to expand...
I can see it now. LV and Reno casinos could offer packages, that include a shuttle from and to the nearest DT. They would pick you up after dropping your car off for tires, take you to the casino to gamble, and then take you back to the tire shop to pick up your car when the "illegal" tires are installed.
 
UG_Passat said:
It's based on a Rolling Resistance Coefficient derived from ISO 28580:2009(E)

View attachment 138445

Here's an interesting paragraph:

View attachment 138446
Click to expand...
Did anyone else notice the mistake?

If they prohibit sale of tires with more than a 9.0 N/kN, they eliminate much more than just the 1 star tires. They also eliminate 2 star tires. It is understandable to try to deal with the worst tires, but that would be too big of a bite. I suspect whoever wrote that up meant more than 10.5 N/kN.

Same for what happens in 2028. The verbiage is correct, but I wonder if that's just a bargaining position so they could negotiate down to eliminating 2 star tires?

Could the first one also be a bargaining position? With the idea being to eliminate 1 start tires and the guy who wrote it gave away the tactic?
 
By 2026, it affects one and two star tires.
But only two years later, it tightens up dramatically; only "7.0" N/kN allowed, which even affects "some four star tires" !
 
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